Cell module

Abstract

A cell module includes a plurality of cylindrical batteries and a holder composed by arranging each of cylindrical batteries in a parallel posture. The holder includes: a holder body having holding spaces for arranging cylindrical batteries at fixed positions; and a sub holder stacked on the holder body. The holder body has stopper portions deformed toward surfaces of cylindrical batteries arranged in holding spaces. The sub holder has push rods that push out stopper portions to cylindrical batteries in a state of being coupled to the holder body. In a state in which the sub holder is coupled to the holder body, in the cell module, the push rods thrust stopper portions against cylindrical batteries, and press the surfaces of cylindrical batteries arranged in holding spaces.

The invention claimed is: 
     
       1. A cell module comprising:
 a plurality of cylindrical batteries; and 
 a holder holding the plurality of cylindrical batteries in a parallel posture, wherein the holder includes: 
 a holder body having holding spaces for arranging the plurality of cylindrical batteries at fixed positions; and 
 a sub holder stacked on the holder body, 
 the holder body includes stopper portions, the stopper portions each being deformed toward a surface of a corresponding one of the plurality of cylindrical batteries arranged in a corresponding one of the holding spaces, 
 the sub holder includes push rods, the push rods each pushing a corresponding one of the stopper portions to a corresponding one of the plurality of cylindrical batteries when the sub holder is coupled to the holder body, and 
 the sub holder is configured to be coupled to the holder body, such that each of the push rods thrusts and move a corresponding one of the stopper portions toward and against a surface of a corresponding one of the plurality of cylindrical batteries arranged in a corresponding one of the holding spaces, wherein a pressure exerted by the stopper portions against the plurality of cylindrical batteries is configured to increase upon coupling of the sub holder to the holder body. 
 
     
     
       2. The cell module according to  claim 1 , wherein the cell module has a structure in which, when the sub holder is coupled to the holder body, each of the push rods is inserted into back surface of a corresponding one of the stopper portions, press each of the stopper portions from the back surface, and thrusts and presses front surface of the corresponding one of the stopper portions against the corresponding one of the plurality of cylindrical batteries. 
     
     
       3. The cell module according to  claim 1 , wherein the front surface of each of the stopper portions is curved surfaces that go along the surface of the corresponding one of the plurality of cylindrical batteries. 
     
     
       4. The cell module according to  claim 1 , wherein each of the push rods of the sub holder have a corresponding one of protrusions that locally push out the back surface of the corresponding one of the stopper portions. 
     
     
       5. The cell module according to  claim 4 , wherein each of the back surfaces of the stopper portions is composed by forming, into a flat shape, a corresponding one of pressed surfaces pressed by the corresponding one of the protrusions provided on the push rods. 
     
     
       6. The cell module according to  claim 1 , wherein the stopper portions are elastic arms deformed and pressed against the cylindrical batteries, and the holder body is made of plastic composed by integrally molding the elastic arms. 
     
     
       7. The cell module according to  claim 1 , wherein
 the holder body includes insertion space having a substantially triangular prism shape as a whole, the insertion space being provided in a region surrounded by three cylindrical batteries arranged in adjacent columns among columns of the plurality of cylindrical batteries, the plurality of cylindrical batteries being arranged in a bale stack and between the cylindrical batteries arranged in a same column, one of the plurality of cylindrical batteries in an adjacent column is arranged, and 
 between the insertion space and the three cylindrical batteries, two of the stopper portions that push out surfaces of two of the plurality of cylindrical batteries are arranged as a pair of stopper portions in an inverse V shape in plan view, and are integrally coupled to the holder body. 
 
     
     
       8. The cell module according to  claim 7 , wherein the holder body is provided with separation slits along both side edges of the stopper portions, each of the separation slits separating the pair of stopper portions from the holder body. 
     
     
       9. The cell module according to  claim 7 , wherein
 between the insertion space and the two of the plurality of cylindrical batteries, two of the stopper portions that press the surfaces of the two of the plurality of cylindrical batteries and a cover portion that covers the surface of one of the plurality of cylindrical batteries are provided integrally with the holder body, and 
 the cover portion has both side edges integrally coupled to the holder body. 
 
     
     
       10. The cell module according to  claim 9 , wherein
 in three of the plurality of cylindrical batteries arranged around the insertion space, two of the three of cylindrical batteries pressed by the stopper portions are connected in parallel to each other, and 
 the two of the plurality of cylindrical batteries pressed by the stopper portions and one of the plurality of cylindrical batteries arranged inside the cover portion are connected in series to each other. 
 
     
     
       11. The cell module according to  claim 1 , wherein
 the holder body includes a rubbery holder formed by molding a rubbery elastic body, 
 the rubbery holder has holding spaces for arranging the plurality of cylindrical batteries, and insertion spaces for the push rods, 
 portions between the insertion spaces and surfaces of the rubbery holder, the surfaces facing the plurality of cylindrical batteries, are defined as elastically deformable stopper portions, and 
 the elastically deformable stopper portions in which the push rods are inserted into the insertion spaces and are thrust and pressed against the surfaces of the plurality of cylindrical batteries. 
 
     
     
       12. The cell module according to  claim 11 , wherein the holder body has a stacked structure of the rubbery holder and a plastic holder. 
     
     
       13. The cell module according to  claim 11 , wherein
 an inner surface of one of the holding spaces has a cylindrical shape that goes along the surface of a corresponding one of the plurality of cylindrical batteries, 
 an outer shape of a corresponding one of the push rods is larger than an inner shape of a corresponding one of the insertion space, and 
 the corresponding one of the push rods is inserted into the corresponding one of the insertion spaces, and the elastically deformable stopper portions are thrust against the surfaces of the cylindrical batteries. 
 
     
     
       14. The cell module according to  claim 11 , wherein the push rods have protrusions that protrude toward the cylindrical batteries arranged to face the stopper portions.